Six people were killed in a separate incident when a Philippine air force helicopter crashed in the southern province of Agusan del Sur

Typhoon Kalmaegi has left at least 52 people dead with 13 others missing in the central Philippines, mostly in widespread flooding that trapped people on their roofs and swept away scores of cars in a hard-hit province still recovering from a deadly earthquake, officials said on Wednesday.

Six people were killed in a separate incident when a Philippine air force helicopter crashed in the southern province of Agusan del Sur on Tuesday while en route to help provide humanitarian help to provinces battered by Kalmaegi, the military said without providing other details, including what could have caused the crash.

Kalmaegi was last recorded early on Wednesday over the coastal waters of Linapacan in the western island province of Palawan with sustained winds of 120km/h (75m/h) and gusts of up to 150km/h (93m/h). It was forecast to blow away into the South China Sea later on Wednesday.

Bernardo Rafaelito Alejandro IV, deputy administrator of the Office of Civil Defense, and provincial officials said most of the deaths were reported in the central province of Cebu, which was pummelled by Kalmaegi on Tuesday, setting off flash floods and causing a river and other waterways to swell.